Shielded module having compression overmold

Abstract

A method for fabricating a radio-frequency (RF) module is disclosed, the method including forming or providing a first assembly that includes a packaging substrate and an RF component mounted thereon, the first assembly further including one or more shielding-wirebonds formed relative to the RF component, and forming an overmold over the packaging substrate to substantially encapsulate the RF component and the one or more shielding-wirebonds, the overmold formed by compression molding that includes reducing a volume of melted resin in a direction having a component perpendicular to a plane defined by the packaging substrate.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to U.S. Provisional Application No. 62 / 168,872 filed May 31, 2015, entitled SHIELDED MODULE HAVING COMPRESSION OVERMOLD, the disclosure of which is hereby expressly incorporated by reference herein in its entirety.BACKGROUND[0002]Field[0003]The present disclosure relates to module shielding technology for various semiconductor devices.[0004]Description of the Related Art[0005]Existing techniques for forming mold caps on packaged semiconductor parts have several limitations and disadvantages. One such existing technique is transfer mold technology, which involves pushing fluid resin into one end of a cavity containing the parts to be capped with mold compound. This technique is prone to trapped air pockets resulting from imbalanced flow, uneven resin distribution, and occasionally damage or warpage to wires on the semiconductor parts. Accordingly a safer and more efficient technique for forming mold caps ...

AI Technical Summary

Benefits of technology

The present disclosure relates to a method for making a RF module by forming a packaging substrate with an RF component mounted on it and shielding-wirebonds, and then using compression molding to form an overmold that encapsulates the RF component and the wirebonds. This molding process includes reducing the volume of melted resin in a way that avoids lateral movement of the wirebonds, which could cause damage to the wirebonds. The technical effect of this method is to improve the reliability and stability of the RF module, ensuring its performance is not affected by external factors such as humidity or temperature variations.

Problems solved by technology

This technique is prone to trapped air pockets resulting from imbalanced flow, uneven resin distribution, and occasionally damage or warpage to wires on the semiconductor parts.

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